I recently changed the sand in my pools filter. Prior to sand replacement I had no issues. The sand I used is pool filter sand, but it looked like normal sand. The sand I removed was all white in color. I was careful removing sand, and didn't see any damage on the downcomer or laterals. The one thing I didn't do was fill the filter with water before adding sand. I filled the filter with sand about 6-8" below the top of the filter. Put everything together, and rinsed the filter for a minute or so. Discharge looked relatively clean, so I put my multi-port back to filter. Yesterday I noticed some slight sand accumulation in the bottom of the pool (areas of low circulation). I had my robot clean it up, and had assumed it may be residual dust from the new sand. However today it seems just as bad as yesterday. Some sand that got on the steps seems fairly fine in size. When I filled the filter with sand, I did pour it slowly, and made sure it was evenly spread within.
Do you think I damaged something? Is there a 'break in' period? Is not all 'Pool Filter Sand' the same? Any help is appreciated. Thanks!